Underwater Pile Cutting
Overview of Under Water Pile Cutting by Abrasive Water Jet
RGL has for many years led the field in abrasive water jet cutting but over recent years we have developed the specialty of cutting hollow steel piles underwater from the inside out. This technology has been successfully deployed in a diverse range environments such as rivers, estuary’s, offshore and on land. To date, we have successfully cut off “piles”, “met masts” and “wind turbine supporting monopiles” ranging in diameter from over 4 meters right down to 300mm and many in between.
Our remote control internal pile cutting system enables us to cut off piles below ground or sea bed level. This removes the need for divers. Typically, we would operate from pontoons or jack-up barges but each situation is different and we adapt accordingly.
Due to the huge variations in sizes and operating conditions, RGL’s in house design and fabrication teams are able to manufacture bespoke rigs and associate equipment to suit most requirements.
Please see the schematic below which outlines RGL’s typical pile cutting process from dredging, proving and cutting.
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- All activities are conducted from a solid platform on land, barge or other suitable marine base meaning that no men are required to enter the water.
- All RGL’s equipment is remotely controlled and can be operated from the solid platform.
- The garnet cutting media used in the cutting operation is an inert mineral which has no negative impact on the environment.
- Internal to external cutting of circular steel piles.
- Decommissioning windfarm monopiles, met masts etc.
- Cutting piles from outside in (external rig required) when there is no requirement to cut below sea bed.
- Sheet pile cutting on jetties and marine terminals.
- North Sea: Meteorological mast; Removal of steel monopile.
- Ellesmere Port: Wind turbine; Removal of steel monopile.
- Tilbury Docks: Marine jetty; Removal of hollow tubular steel piles.
- Bombay Sapphire: Ornamental glass house; Cutting of Larssen sheet piles (300mm below river bed).
- River Tyne: Tunnel; Removal of large diameter temporary circular steel piles.
- Southampton Docks: Marine jetty; Removal of circular steel piles.
- Canary Wharf: West India Dock; Removal of temporary piles supporting a building.
- Blythe Wind Farm: removal of two 3.2m diameter piles cutting below sea bed level.